Punch.



0. A. sMmw B. F. munrwscu.

PUNCH.

APPHGATION FILED DEC. 10. 1914.

1,157,260. I Patented 001. 19, 1915.

UNITED sTATns ra'rnr OFFICE.

OSCAR A. SMITH AND BENJAMIN F. RINDFLEISCH, F CLEVELAND, OHIO,ASSIONORS TO THE NATIONAL-ACME MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A

CORPORATION OF OHIO.

Specificatio n of Letters Patent.

PUNCH.

Patented 0a. 19, 1915.

Original application filed July 21, 1914, Serial No. 852.168. Divided and this application filed December 10,

To all whom it may concern:

Be -it known that we, OSCAR A. SMITH and BENJAMIN F. RINDFLEIsCH, citizens of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio. have invented certain new and useful Improvements in Punches, of which the following is a specification. I

This invention relates to punches for use in the castellation of nuts and adapted for use in presses such for instance as that shown in our contemporaneously pending allowed application SerialNo. 852,168, filed July 21, 1914, of which the present application is a division, the object of theinvent'ion being to provide an improved punch of this character by means of which the nuts may ':be punched from the center toward the out,- =side, and which punch is very much stronger than punches ordinarily used forthis purpose and very durable in use.

Another object of'the invention is theprovision of an improved punch holder having means for preventing endwise and sidewise play of the punch.

Ordinarily the punches used for castellatjng nuts are very light, usually being no wider than the width of the slot to be unched, and in consequence it is impractigocable to punch the nuts from the outside toward the center, because, owing to thecomparative narrowness of the punch and the lightness of its construction, WlllCh-lS necessary in order that the punch pass into the slot, the punch quickly collapses and wears out, and so far as we are aware no practical means have been devised by means of which a heavier punch may be used.

In the drawings accompanying and forming part of'this specification, Figure 1 1s a perspective view ofthis improved punch 5nd its holder; Fig. 2 is a side view of the punch and showing themeans for preventing endwise play of the punch; Fig. 3 illustrates a perspective new and a cross section of the punch proper; and F 1g. 1s a sectionalview illustrating a part of the press with which this improved punch is adapted for use and showing the position of the punch relative to the die and the feed plunger.

Simflarfcharacters of reference indicate, wise,

1914. Serial No. 876,408.

corresponding partsin the different figures of the drawings.

The punch2, which is intended to operat 1n a direction transverse to its length, that is with the punch in a horizontal position, comprises a lengthwise extending shank having at one side midway of its Width a lengthwise extending rib forming at its forward end a cutting portion or point, which cutting portion has parallel or substantially parallel sides so that such cutting portion is of the width of the slot to be punched," and as this point must be narrow to correspond with the size of slot desired it followsthat unless such punch is materially reinforced it is very weak and inefiicient, it bein understood of course that different sizes 0 slots require different sizes of punches. The lengthwise extending rib enables the punch as it becomes worn at its cuttingp/id to be repeatedly resharpened. The punch is formed in such a manner that it widens out considerably just back of the point, thereby making a very much stronger punch than the ordinary punch, which is, as'stated, usually of the same thickness as at the point. In the present instance the punch is shown with a rounded tapered surface tapering In the present improvement the punch tapers from the sides thereof toward the cutting end, and also tapers from one, as the top, side thereof toward thev cuttin end, thus providing what may be descri ed as transversely tapered surfaces. Bymeans of this construction a very heavy, rigid and reinforced punch is obtained. This punch is carried by a punch holder in the form of an arm 5 which is pivoted on a shaft 6, which'shaft is supported on a bearing block 7 carried by the punch press, and the shaft is held in position on such block by a bearing cap 8, which is provided with elongated slots 9 so as to render the cap capable of sliding 'on bolts (not shown) adapted to pass through holes 10 in the bearing block 7, thereby permitting the bearing cap to he slid off to permit the pivot or shaft 6 and the punch arm to be removed and replaced. A look block 11 detachably carried by the holder 5 holds the punch in position sidewhile a cylindrical lock block 12,

' from the thickened body 4 toward the point.

through which passes an adjusting screw 13, holds it in position endwise, the lock block 12 fitting into a groove 14 of the holder at eaclrsideof, the ,punch. By means of this cylindrical" lockblock 12 and adjusting screw "13 it is found practical to prevent the punch from working out of its arm or holder endwise, as the bearing of the cylindrical lock block 19. in its curved grooves makes the lock positive, while-the adjusting screw 13 permits of any desired relation between the punch and the cylindrical block.

Ordinarily in the operation of a press of the character shown in the aforesaid application the ram would strike on the top of the punch arm at the point a. which is a considerable distance removed from the working point ofv the punch, and the continual action of the power at a point sofar back of the actual cutting point would have a tendency to bend the point of the punch upward and destroy its usefulness. This disadvantage is entirely eliminated by the provision of means which enables the power to be applied at approximately the cutting pointof the punch, in that while the stroke of the ram is still. delivered at the point a vit is delivered in such a manner that it is "transmitted adjacent to the cutting polnt of the punch. and for this purpose a hardened cylindrical ram extension 15' is provided, this extension being set into the punch holder or arm on an angle so that while the top of this extension is some distance back from the point of the punch yet the power will be applied to the punch within a short distance from its point. This ram exten sion 1:? extends somewhat above the punch carrying arm, so that the ram will always strike on the end of the extension instead of striking on the top of the punch arm. The

extension 15 is loosely fitted in the arm and transmits the power directly from the ram to a point adjacent'to the cutting point of the punch, and consequently prevents any bending of the punch during its operation. Moreover, owing to the manner of supporting the punch, which makes possible the distance between the point of the punch and its pivotal support 7 the punch, in traveling from the bore of the nut outwardly, travels practically in almost a straight line. other words, while the horizontally located punch moves in an arc of a circle, yet the length of the radius of this are is such that the point of the punch moves in almost a straight line, thus resulting in the production of a slot having its bottom almost flat.

From the foregolng it will be observed thatv not only have we provided a punch which is very much stronger and more durable. than any of the unches-heretofore in use, but by reason of t e fact'that the punch is not connected in any way with the ram or ram slide of the press, or with the power driven shaft, any lost motion of the rain the ram slide, or the shaft, or at the pivotal point of the punch, does not affect the action of the punch, and especially isthislso '2. A punch adapted to operate in a dirfece tion transverse to its length and havin a rib-formed cutting portion having para lel side walls, said rib-formed cutting portion extending lengthwise of the punch along its underside.

3. A punch adapted to operate ina direction transverse to its length and havin a rib-formed cutting portion having para lel side walls, said ribformed cutting portion extending lengthwise of the punch and midway thereof. f. A punch adapted to operate in a direction transverse to its length and having along one side face thereof a rib-formed 'eutting portion having parallel side walls, said rib-formed, cutting portion terminating in 'a widened shank.

5. A punch adapted to operate in a direction fmnsverse to its length and having along one side face thereof a rib-formed cutting portion having parallel side walls, said rib-formed cutting portion terminating in a widened shank provided at the forward end thereof with a bevel portion.

' 6. A punch adapted to operate in a tion transverse to its length and having along one side face thereof a rib-formed cutting portion having parallel side walls, said rib-formedcutting portion terminating in a widened shank provided at the forward end thereof with portions tapering inwardly from the sides of the widened portion of the shank. Y

7. A punch adapted to operatein a direction transverse to its length and comprising a lengthwise extending shank having at one side thereof a lengthwise extending rib provided with parallel side walls forming at the forward end of the punch a-cntting portion.

8. A punch adapted to operate in a direction transverse to its length and comprising a lengthwise extending shank having at one side thereof a. lengthwise extending rib provided with parallel side walls formingat the forward end of the punch a cutting por- I tion, said rib being located midway of the width of the shank.

9. A punch adapted to operate in a dimetion transverse to its length andcomprising direction, said rib being located midway of the width'of the shank and said punch having a tapered forward edge the apex of which terminates abo e the cutting edge of the rib.

' 10. A punch adapted to operate in a direction transverse to its length and having along one side face thereof a rib-formed cutting portion having parallel side walls, a punch holder adapted to carry said punch, and means for locking the punch against endwise play.

-11. A punch adapted to operate in a direction transverse to its length and having along one side face thereof a rib-formed cutting portion having parallel side walls at its cutting portion, a punch holder adapted to carry the punch, and adjustable cooperating, means carried by the punch and holder for locking the punch against endwise play.

12. A punch holder adapted to carry a piuich, and adjustable means in the rear of the punch for locking the punch against endwise play, said means'including a cylindrical lock located in curved ways of the holder.

13. A punch adapted to operate in a direction transverse to its length and having along one'side face thereof a rib-formed cutting portion having parallel side walls, a

punch holder adapted to carry the punch,.

and means for sidewise play.

14. A- punch adapted to operate in a dilocking the punch against rection transverse to its length and having along one side face thereof a rib-formed cutting portion having parallel side walls, a punch holder adapted to carry said punch,

-means for locking the punch against endwise play, and means for locking the punch against sidewise play. I j

15. A punch adapted to operate in a direction transverse to its length and compriss ing a lengthwise extending shank having at one side thereof a lengthwise extending rib provided with parallel side walls forming portion, said rib being located iidway of the width of the shank and said punch having a tapered forward edge the apex of which terminates above the cutting edge of the rib, a punch holder adapted to carry said punch, and cooperating means carried. by the punch and holder for locking the punch against endwise play.

16. A punch adapted'to operate in a direction transverse to'its length and comprising a lengthwise extending shank having at oneside thereof a lengthwise extending rib provided with parallel side walls forming at the forward end of the punch a cutting portion, said rib being located midway of the Width of the shank and said punch having a tapered forward edge. the apex of which terminates above the cutting edge of the rib, a punch holder adapted to carry said'punch, cooperating means carried by the punch and holder for locking the punch against endwise play, and means for looking the punch against sidewise play.

17. The combination of a punch having along one side face thereof a rib-like cutting portion and a reinforcing body por-' tion, a punch holder adapted to carry said punch, and means for locking the punch against endwise play and including a cylindrical lock located in transverse curved Ways of the holder.

18. The combination of a punch having a.

rib-like cutting portion and a reinforcingbody portion, a punch holder adapted to carry said punch, and adjustable means for Signed at Cleveland, in the county 0131.00 Cuyahoga and State of Ohio, this 8th day I of December, 1914. v Q at the forward end of the punch a cutting Witnesses:

JOHN L. Monnrssnr, O. F. DOUGLAS. 

